| Abstract: | The morphology and physicomechanical properties of carbonized PAN fibers (oxidized and heat-treated to 1500, 2000, and 2750°C) have been studied. It is shown that surface and internal structural defects sharply reduce the values of the physicomechanical characteristics of the carbonized fibers. The scanning electron microscope reveals the nonuniformities of the fiber over the fracture surface and makes it possible to take into account the effect of macro- and microdefects in studying fiber strength.Topchiev Institute of Petrochemical Synthesis, Academy of Sciences of the USSR, Moscow. Institute of Fossil Fuels, Moscow. Translated from Mekhanika Polimerov, No. 6, pp. 1122–1124, November–December, 1971. |
